Malicious PDF — malware analysis report

Static analysis result for SHA-256 074a4c0cb91dcb08…

MALICIOUS

PDF

44.3 KB Created: 2020-09-24 01:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 018484f33937c89f13f3592a32fa99d9 SHA-1: d579cc8c18bb05e6f4b03701f65b814a98de6e23 SHA-256: 074a4c0cb91dcb08603ae3ee157ac0b57c8bd9d9ec60a763c6d887a4cf9df1e4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.me'. It also exhibits a link farm pattern with numerous external PDF links, many hosted on Shopify. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=cnn+10+september+20+2019', suggesting a lure to external content. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/wix?keyword=cnn+10+september+20+2019
    • http://files.okichitaw.com/uploads/1/3/1/4/131454549/povubafifinow.pdf
    • http://files.rightmovecolorado.com/uploads/1/3/2/6/132681219/3235991.pdf
    • http://files.agoutistudios.com/uploads/1/3/1/4/131438423/gibeduze-xufirujila-tibaled-xidijo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/sobokifexesetaxifal.pdf
    • https://cdn.shopify.com/s/files/1/0428/8099/1395/files/75689202019.pdf
    • https://cdn.shopify.com/s/files/1/0435/5499/6383/files/azan_ki_dua.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0725/files/47145621915.pdf
    • https://cdn.shopify.com/s/files/1/0432/2168/0283/files/boomerang_online_movie.pdf
    • https://cdn.shopify.com/s/files/1/0428/8741/3923/files/sanubo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3844/0598/files/gefijexu.pdf
    • https://72aaadc4-094b-4152-9302-8f2f2fb49900.filesusr.com/ugd/a2d007_37c8baa9eaa14ccb9abd11a42563389c.pdf?index=true
    • https://b8f4c569-fe1e-4bc2-91d5-302c49b61ab3.filesusr.com/ugd/e56fe2_90f2847e707f4fb98dcede5c9d321fbb.pdf?index=true
    • https://b4c49441-600b-4761-98bc-55d1cb34146d.filesusr.com/ugd/3eb4bd_03da8c0949b14102bb70f6b9dce373fd.pdf?index=true
    • https://18f41fd9-cdce-4c9d-b221-024d0adb19b7.filesusr.com/ugd/ca32a8_35792dde7dee46a3a918550f9facb2c7.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dc4.bin
e842c78e49dd002f3a345d4599cc4203de09c4344de69e843dfc67d51629a17e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC4 5252 bytes
font_01_sfnt_off00007f82.bin
cfbd68b99145ee4a466d75dda3b769a59e1a5b80b214abd554ae820fc08f880e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F82 11048 bytes